Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b4f426ac7820d5…

MALICIOUS

PDF

106.8 KB Created: 2021-03-11 18:50:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc4319a6cff5b3d092b6d6d9b7e233a SHA-1: d07a895e52c68e6d77e451df963b69487e3f0c13 SHA-256: 02b4f426ac7820d5423d0834e0456545d18a28fa0dccb12e957b4f350f31d410
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, including a large link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The embedded URL and the heuristic firings suggest the document is designed to redirect users to malicious sites, likely for phishing or to download further malware. The document body text, though garbled, includes a search query that serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/strik?utm_term=what+are+the+different+types+of+abbreviations
    • http://dekiweragaf.mywebcommunity.org/card_college_light.pdf
    • http://mizafaroremida.getenjoyment.net/famikifexa.pdf
    • http://sevoxotedeki.medianewsonline.com/22792153759.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lopadivupudexa/ruputozapaxovol.pdf
    • https://s3.amazonaws.com/jupoti/bargaining_for_advantage_richard_shell.pdf
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_e499521d22984127b4742c6489714d09.pdf?index=true
    • https://s3.amazonaws.com/padosumifubobo/89316812690.pdf
    • https://s3.amazonaws.com/goneduzum/noun_verb_adjective_adverb_formation.pdf
    • https://s3.amazonaws.com/zubata/fafidubudej.pdf
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_10f411ace8bf480dbcb1ba40ec2f3d92.pdf?index=true
    • http://zigexejumex.epizy.com/bibliometric_analysis_of_journal.pdf
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_febb2bb8c81a442cb5c32c70ec89c44f.pdf?index=true
    • https://0df6220b-9630-4647-aab6-0d9db69b9d59.filesusr.com/ugd/8b97dd_0c8b87d7faee41ab9d7f60856a77cab1.pdf?index=true
    • http://faleferesevo.onlinewebshop.net/what_does_flipping_tires_workout.pdf
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_599ec942eb8642f8944c26fb1c9321a5.pdf?index=true
    • http://fafinonez.rf.gd/centrifugal_compressor_off_design_performance.pdf
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_fd69f33a417b4525b047f699f20d0347.pdf?index=true
    • http://xomemajerezazaz.rf.gd/xagiminibuxezowuliw.pdf
    • https://1682489e-d94b-4f22-b6a6-c8ecb623ca2e.filesusr.com/ugd/5f226e_d48cdd13f89040ddaf5de3a5d7f71c38.pdf?index=true
    • https://s3.amazonaws.com/falufusu/jipokusegesikej.pdf
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_b4e23e7c0f0d4efaa7df62ba2264fc3d.pdf?index=true
    • https://s3.amazonaws.com/bulolimepol/48583217784.pdf
    • https://s3.amazonaws.com/wutisigila/free_geometry_drawing_software.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013a3a.bin
bc461e679a10804e3bc90e0b5bfeb4ad85137e4be24ac9c926ba11aaf3a60a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3A 4248 bytes
font_01_sfnt_off0001494e.bin
3e2686dfb9a5084306102630bbc1206d365ac00ea36e3ef15c55c07cce102049		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1494E 5412 bytes
font_02_sfnt_off00015bc2.bin
ab9976645102a16a8ba1c0b1623e2b4e616938c520a13a03023229bf7f8e5906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BC2 13848 bytes
font_03_sfnt_off00018794.bin
2aa6e06f0ef08a9a3160fdcf3bf1b4c92abedef19572ce5cc50c62162ba4ba85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18794 16180 bytes

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